Paper Title:
Impedance Changes and Carbon Stability during the Heat Treatment of Si3N4–Carbon Composites
  Abstract

Electrical properties of the insulator silicon nitride ceramics may be improved by addition of electrical conductive parts. The conductive carbon parts were mixed with the base ceramic matrix to form a percolation network. Electrical current can flow through the ceramic by using the connected carbon channels. In air atmosphere however, the carbon can oxidize and burn out. Heat treatments were performed to observe the carbon degradation in composites in atmosphere. As resulted, the carbon exhaust started at 400°C from surface and finished above 750°C. Electrical measurements showed the conductor-insulator transformation. Thermo-gravimetric measurements suggested that some carbon inclusion still remained in isolated closed porosities.

  Info
Periodical
Edited by
J. Dusza, R. Danzer, R. Morrell and G.D. Quinn
Pages
365-368
DOI
10.4028/www.scientific.net/KEM.409.365
Citation
B. Fényi, N. Hegman, K. Szemmelveisz, C. Balázsi, "Impedance Changes and Carbon Stability during the Heat Treatment of Si3N4–Carbon Composites", Key Engineering Materials, Vol. 409, pp. 365-368, 2009
Online since
March 2009
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Zhao Hui Huang, Xun Hai Tang, Yan Gai Liu, Ming Hao Fang
Abstract:A new environment friendly method to synthesize sialon composites using fly ash with high content of Al2O3 by carbon-thermal...
933
Authors: Csaba Balázsi, Ferenc Wéber, Péter Arató, Balazs Fényi, Norbert Hegman, Zoltán Kónya, Imre Kiricsi, Zófia Vértesy, László Péter Biró
Abstract:This work is focusing on exploring preparing processes to tailor the microstructure of carbon nanotube (CNT) reinforced silicon...
1723
Authors: Ju An Zhao
Abstract:A multi-layer coating SiC/ Si - MoSi2 /MoSi2 with good oxidation resistance has been developed by using the slurry-sintering method on the...
1
Authors: Wan Chang Sun, He Jun Li, Qian Gang Fu, Shou Yang Zhang
Abstract:PAN-carbon fibers were pretreated using three methods. 2D-C/C composites were fabricated by a rapid chemical liquid-vaporized infiltration...
482
Authors: Ying Cao, Li Pan
Chapter 2: Materials Science
Abstract:In the present investigation, resin transfer molding has been used to produce high quality carbon fiber epoxy composites and...
753